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Date: Wed, 1 May 2024 07:22:07 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-26977: pci_iounmap(): Fix MMIO mapping leak Description =========== In the Linux kernel, the following vulnerability has been resolved: pci_iounmap(): Fix MMIO mapping leak The #ifdef ARCH_HAS_GENERIC_IOPORT_MAP accidentally also guards iounmap(), which means MMIO mappings are leaked. Move the guard so we call iounmap() for MMIO mappings. The Linux kernel CVE team has assigned CVE-2024-26977 to this issue. Affected and fixed versions =========================== Issue introduced in 5.15 with commit 316e8d79a095 and fixed in 5.15.154 with commit 5e4b23e7a7b3 Issue introduced in 5.15 with commit 316e8d79a095 and fixed in 6.1.84 with commit 6d21d0356aa4 Issue introduced in 5.15 with commit 316e8d79a095 and fixed in 6.6.24 with commit b5d40f02e722 Issue introduced in 5.15 with commit 316e8d79a095 and fixed in 6.7.12 with commit f3749345a9b7 Issue introduced in 5.15 with commit 316e8d79a095 and fixed in 6.8.3 with commit af280e137e27 Issue introduced in 5.15 with commit 316e8d79a095 and fixed in 6.9-rc1 with commit 7626913652cc Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2024-26977 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: lib/pci_iomap.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/5e4b23e7a7b33a1e56bfa3e5598138a2234d55b6 https://git.kernel.org/stable/c/6d21d0356aa44157a62e39c0d1a13d4c69a8d0c8 https://git.kernel.org/stable/c/b5d40f02e7222da032c2042aebcf2a07de9b342f https://git.kernel.org/stable/c/f3749345a9b7295dd071d0ed589634cb46364f77 https://git.kernel.org/stable/c/af280e137e273935f2e09f4d73169998298792ed https://git.kernel.org/stable/c/7626913652cc786c238e2dd7d8740b17d41b2637
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